Revolution Performance 85" Big Bore Kit Black with Highlighted Fins 201-204W This 85" bolt-on kit will bring your ride to life and delivers major power with no machine work Features aerospace grade all aluminum cylinders with nickle silicon carbide electroplated bores Provides a more oleophilic surface and high wear resistance Also includes Wiseco Performance Products forged pistons with rings, wrist pins, circlips and high performance head and base gaskets Black cylinders with highlighted fins